DEEP: Nitrogen Control Program for Long Island Sound

Nitrogen Control Program for Long Island Sound

Each summer, the bottom waters in the western half of Long Island Sound experience hypoxia, or very low levels of dissolved oxygen. Extensive monitoring and modeling of Long Island Sound have identified the excessive discharge of nitrogen from human activities as the primary pollutant causing hypoxia. Nitrogen fuels the growth of algae in the Sound, which eventually decays, consuming oxygen in the process. There is enough nitrogen added by human activity to cause a hypoxia problem each summer. 

In 2001, Connecticut DEEP and New York DEC, in concert with US EPA, completed plans for nitrogen control that identifies the maximum amount, or the Total Maximum Daily Load (TMDL), of nitrogen that can be discharged to Long Island Sound without significantly impairing the health of the Sound.  One of DEEP’s management strategies to reduce nitrogen loading was to develop an innovative nitrogen-trading program among 79 sewage treatment plants located throughout the state. Through the Nitrogen Credit Exchange, established in 2002, Connecticut looks forward to reducing the nitrogen load from that source by nearly 65% by 2014.

Future Plans for the Nitrogen Trading Program

DEEP, working with the Nitrogen Credit Advisory Board (NCAB), has initiated steps regarding the future plans of the Nitrogen Trading Program detailed below:

Presentation on Future Plans for the CT Nitrogen Trading Program 9/17/2014 (PDF)

Notice of the Future Plans of the Nitrogen Trading Program (PDF)

Projected Buyers and Sellers List for the Proposed Program (PDF) (revised September 17, 2014)

A Forum to present more information about the near-term goals of the Nitrogen Trading Program was held on Wednesday September 17, 2014 at 10:00 a.m., at DEEP Headquarters, Phoenix Auditorium, 79 Elm St. in Hartford.  The public was invited to participate.  Please call Iliana Raffa at (860)424-3758 if you have any questions.

General Information

Baseline Nitrogen Loads, Wasteload Allocation and Permitting

For further information on baseline nitrogen loads, wasteload allocation and permitting, please contact CT DEEP at (860) 424-3704.

Nitrogen Credit Exchange

For further information on nitrogen credit exchange, please contact Iliana Raffa at (860) 424-3758.

Additional contacts for Nitrogen Control Program:
  • Betsey Wingfield - (860) 424-3704; Bureau Chief, Bureau of Water Protection and Land Reuse

LIS Water Quality Program & Info


Content last updated: Deecember 17, 2014